I’d like to dispute the above comment. The grammar might not be impeccable but the site is not meant to train journalists either. To answer your question Paulab, I haven’t come across a similar site so far . I did the Fast success test last week and I like the idea. its not hard btw coz you only need to write a few short passages, find mistakes in written content and so forth – you can see their test overview here. my advice is to take the tests if you are not a native English speaking writer but you are looking for better paying jobs